/Engine/Source/Runtime/GeometryCore/Public/Spatial/SparseGrid3.h
Dynamic sparse 3D grid. Useful in cases where we have grid of some type of non-trivial object and we don't want to pre-allocate full grid of them. So we allocate on-demand. This can be used to implement multi-grid schemes, eg for example the ElemType could be sub-grid of fixed dimension.
template<typename ElemType> class TSparseGrid3
FAxisAlignedBox...
Bounds
Accumulated bounds of all indices inserted into Elements. Not currently used internally.
TMap<FVector3i...
Elements
Sparse grid of allocated elements